I have a custom PC that I built about 6 or 7 years ago that is freezing randomly for about 5 now. It is a P4 2.4GHz, has 256Mb RAM, a Mach Speed P4XFCP mother board, G-Force 4 MX440SE graphics card, Western Digital 80gig hard drive, V-Stream VS-L883D video capture card, Generic 3.5in floppy drive, & Lite-on CD burner. I have re-formated with Win XP (format, deleted partition, repartition, & install) 5 times, removed all unnecessary hardware (video capture card & 3.5 drive), swapped with new hardware ( RAM, processor, CD-ROM, & video card). After all that it still freezes at anytime. It may freeze at boot or it may freeze after 1 hour of use. There is no consistency. I have tried to run diagnostic software but it could freeze at anytime. If anybody has any ideas of what I could try next it would be good. I think that I have swapped everything but the mother board. All hardware that I swapped with was working. Is there any way it could be the power supply? Thanks for any help.